There does not appear to be any mechanism for this on GTA IV. Presumably because one of the many pastimes on GTA IV is driving like a maniac to get away from the cops, so you wouldn't be worrying about indicating!
NO
Yes But No Parachute.
NO! never!
Yes
Under the bridge
Annihilator
You can fly helicopters.
press r3
Place the disk in your PC and Continue from there
It came out and is very popular
Download it from gta mods downloads
she is a government agent